题目内容

脱式计算.
(1)95.4÷18-5.4×
1
18

(2)455+45÷0.5-24×5.5
(3)
1
9
÷〔(
2
3
-
1
5
)×
5
7
(1)95.4÷18-5.4×
1
18

=95.4×
1
18
-5.4×
1
18

=(95.4-5.4)×
1
18

=90×
1
18

=5;

(2)455+45÷0.5-24×5.5,
=455+90-132,
=545-132,
=413;

(3)
1
9
÷[(
2
3
-
1
5
)×
5
7
],
=
1
9
÷[
7
15
×
5
7
],
=
1
9
÷
1
3

=
1
3
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